#include <REGX52.h>
#include <INTRINS.h>


void Delayxms(unsigned int xms)		//@12.000MHz
{
	unsigned char i, j;

	while(xms)
	{
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
		xms--;
	}
	
}


void main()
{

	while(1)
	{
		P2 = 0xFE; //1111 1110
		Delayxms(100);
		P2 = 0xFD; //1111 1101
		Delayxms(100);
		P2 = 0xFB; //1111 1011
		Delayxms(100);
		P2 = 0xF7; //1111 0111
		Delayxms(100);
		P2 = 0xEF; //1110 1111
		Delayxms(100);
		P2 = 0xDF; //1101 1111
		Delayxms(100);
		P2 = 0xBF; //1011 1111
		Delayxms(100);
		P2 = 0x7F; //0111 1111
		Delayxms(100);
	
	
	}
}